Home / 728,772.90-1,005,710.08-402,085.89

Finding the Fourth Proportional to 728,772.90, 1,005,710.08 and 402,085.89

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Solution

The fourth proportional to 728,772.90, 1,005,710.08 and 402,085.89 is: 554,880.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,772.90 : 1,005,710.08 = 402,085.89 : x
  2. Step 2: Convert to fraction form
    728,772.90/1,005,710.08 = 402,085.89/x
  3. Step 3: Cross multiply
    728,772.90x = 1,005,710.08 × 402,085.89
  4. Step 4: Simplify right side
    728,772.90x = 404,381,829,330.90
  5. Step 5: Solve for x
    x = 404,381,829,330.90/728,772.90
  6. Step 6: Final answer
    x = 554,880.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.